android– 如何移动文本视图？

概述我在框架布局中有textview和imageview,我想用手指在图像上移动文本.<FrameLayoutandroid:id="@+id/framelayout"android:layout_marginTop="30dip"android:layout_height="fill_parent"android:layout_width="fill_parent"&

我在框架布局中有textvIEw和imagevIEw,我想用手指在图像上移动文本.

<FrameLayout      androID:ID="@+ID/framelayout"     androID:layout_margintop="30dip"     androID:layout_height="fill_parent"      androID:layout_wIDth="fill_parent">     <ImageVIEw           androID:ID="@+ID/ImageVIEw01"          androID:layout_height="wrap_content"           androID:layout_wIDth="wrap_content"/>    <TextVIEw androID:ID="@+ID/text_vIEw"          androID:layout_margintop="30dip"          androID:layout_wIDth="wrap_content"           androID:maxlines="20"          androID:scrollbars="vertical"          androID:layout_height="wrap_content"/></FrameLayout>

我尝试了一些代码,但它没有正常工作告诉我正确的方法.

    public boolean ontouch(VIEw v, MotionEvent event) {    float x1 = 0, x2, y1 = 0, y2;    String direction;    switch(event.getAction()) {            case(MotionEvent.ACTION_DOWN):                x1 = event.getX();                y1 = event.getY();                break;            case(MotionEvent.ACTION_UP): {                x2 = event.getX();                y2 = event.getY();                float dx = x2-x1;                float dy = y2-y1;                    // Use dx and dy to determine the direction                if(Math.abs(dx) > Math.abs(dy)) {                    if(dx>0) direction = "right";                    else direction = "left";                } else {                    if(dy>0) direction = "down";                    else direction = "up";                }            }    }    return false;}

解决方法:

我通过使用此代码得到答案

    vg = (VIEwGroup)findVIEwByID(R.ID.vg);    vg.setontouchListener(new VIEw.OntouchListener() {    @OverrIDe    public boolean ontouch(VIEw v, MotionEvent event) {       switch(event.getActionMasked())          {             case MotionEvent.ACTION_MOVE:                 int x = (int)event.getX() - offset_x;                 int y = (int)event.getY() - offset_y;                 int w = getwindowManager().getDefaultdisplay().getWIDth();                 int h = getwindowManager().getDefaultdisplay().getHeight();                 if(x > w)                     x = w;                 if(y > h)                     y = h;                 linearLayout.LayoutParams lp = new linearLayout.LayoutParams(                                 new VIEwGroup.marginLayoutParams(                                 linearLayout.LayoutParams.FILL_PARENT,                                 linearLayout.LayoutParams.FILL_PARENT));                 lp.setmargins(x, y, 0, 0);                 selected_item.setLayoutParams(lp);                 break;             default:                 break;          }       return true;    } });   tv = (TextVIEw)findVIEwByID(R.ID.text_vIEw2);   tv.setontouchListener(new VIEw.OntouchListener() {   @OverrIDe   public boolean ontouch(VIEw v, MotionEvent event) {      switch(event.getActionMasked())      {        case MotionEvent.ACTION_DOWN:             offset_x = (int)event.getX();             offset_y = (int)event.getY();             selected_item = v;             break;        default:             break;      }                                     return false;   }   });}    

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